Antenna



FIG. 1 is a front perspective view of an antenna showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a right side view thereof; the left side being a mirror image thereof;

FIG. 5 is a front elevational view thereof, the rear elevational view being a mirror image thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

CLAIM The ornamental design for an antenna, as shown and described. 